Electronic technique for temperature compensation of fibre Bragg gratings sensors
Electronic technique for temperature compensation of fibre Bragg gratings sensors
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DOI：
10.1016/j.aeue.2007.01.008
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发表时间：
2008-01-01
影响因子：
3.2
通讯作者：
Ferreira, E. C.
中科院分区：
文献类型：
--
作者：
Dias, J. A. Siqueira;Leite, R. L.;Ferreira, E. C.
由光纤布拉格光栅（FBG）组成的光学传感器正成为广泛传感应用的选择。然而，为了制造与温度无关的传感器，必须补偿FBG的固有温度依赖性。在这封信中，我们提出了一种非常有效的，简单的和低成本的新技术，用于稳定的询问电流幅度检测系统，使用激光二极管源和一对匹配的FBG的偏置点。电子反馈控制电路测量由于参考FBG中的温度变化而引起的波长偏移，并激励激光二极管温度，以引起其波长输出的变化并补偿FBG传感器的温度依赖性。(C)2007年，Elsevier GmbH。All rights reserved.
Optical sensors composed of fibre Bragg gratings (FBG) are becoming a choice for a wide range of sensing applications. However, in order to manufacture temperature independent sensors, it is necessary to compensate for the intrinsic temperature dependence of the FBG. In this letter we present an extremely effective, simple and low cost novel technique for stabilising the bias point of an interrogation current amplitude detection system which uses a laser diode source and a pair of matched FBGs. An electronic feedback control circuit measures the wavelength shift due to temperature variations in a reference FBG and actuates on the laser diode temperature, to induce changes in its wavelength output and compensate for the temperature dependence of the FBG sensor. (C) 2007 Elsevier GmbH. All rights reserved.